In research as well as in practice, process models are an expatiated element of innovation management. They fulfill different tasks. In practice, for instance, process models are used as a management tool to standardize development activities. Researchers try to identify activities to be found in every product development process. The design of the different process models is as manifold as their application. It heavily depends on the intention of the practitioner or academic. Therefore, there exists no one best way. Partially, one academic uses different process models for different research designs. The aim of this working papaer is to give management scholars and practitioners a review of different fields of application and design of innovation process models. For this purpose, a brief retrospection of the emergence and advancement of process models and a selection of process models is provided.